Looking for a simple form of ventilation that does not involve a power supply. Seen them in pub toilet windows, some with a pull cord that are used to open and close the vent to outside air.
Basically they have a free moving rotor that rotates with wind (not electrical) and provides a very simple form of ventilation. Would be looking for one that is about 130mm in diameter.
Does anyone know what these rotor vents are actually called and where I can buy them, I have tried looking.
thanks
Basically they have a free moving rotor that rotates with wind (not electrical) and provides a very simple form of ventilation. Would be looking for one that is about 130mm in diameter.
Does anyone know what these rotor vents are actually called and where I can buy them, I have tried looking.
thanks